JPS57127344A - Detecting system of faulty area - Google Patents

Detecting system of faulty area

Info

Publication number
JPS57127344A
JPS57127344A JP1254781A JP1254781A JPS57127344A JP S57127344 A JPS57127344 A JP S57127344A JP 1254781 A JP1254781 A JP 1254781A JP 1254781 A JP1254781 A JP 1254781A JP S57127344 A JPS57127344 A JP S57127344A
Authority
JP
Japan
Prior art keywords
repeater
optical
fault
circuit
short circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1254781A
Other languages
Japanese (ja)
Inventor
Hiroo Kitasagami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP1254781A priority Critical patent/JPS57127344A/en
Publication of JPS57127344A publication Critical patent/JPS57127344A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/407—Monitoring; Testing of relay systems without selective localization
    • H04B17/409—Monitoring; Testing of relay systems without selective localization by means of resistance, voltage or current measurement

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

PURPOSE:To realize a highly accurate detection even for a fault caused at a remote place in an optical cable transmission system, by giving a short circuit to a metallic conductor by means of a connection box and an optical repeater detected in the case of a fault and measuring the DC resistance at a transmission end office. CONSTITUTION:The optical signal of a regular code transmitted from a transmission end office 1' is monitored by an optical repeater 4'. When the regularity of the code is disturbed, a code rule monitoring circuit 29 of the repeater 4' produces the pulse to give a short circuit to an intermediate pair of metallic conductors 14 by means of a switch SW3. In case an optical fiber cable 13 at the front stage of the repeater 4' is broken, a switch SW2 is actuated by a large change of the voltage which is supplied to a photoelectric converting circuit 22 via an AGC circuit 27 to give a short circuit to the conductors 14. As a result, whether the repeater 4' or the cable 13 has a fault can be decided from the measured value of the DC resistance of the conductor 14 and at the station 1'.
JP1254781A 1981-01-30 1981-01-30 Detecting system of faulty area Pending JPS57127344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1254781A JPS57127344A (en) 1981-01-30 1981-01-30 Detecting system of faulty area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1254781A JPS57127344A (en) 1981-01-30 1981-01-30 Detecting system of faulty area

Publications (1)

Publication Number Publication Date
JPS57127344A true JPS57127344A (en) 1982-08-07

Family

ID=11808352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1254781A Pending JPS57127344A (en) 1981-01-30 1981-01-30 Detecting system of faulty area

Country Status (1)

Country Link
JP (1) JPS57127344A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040005017A (en) * 2002-07-08 2004-01-16 이길락 Remote checking system of optical fiber connecting box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040005017A (en) * 2002-07-08 2004-01-16 이길락 Remote checking system of optical fiber connecting box

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